Sound-reproducer mounting



April 5',1927.

G. A". GILLEN SOUND REPRODUCER MOUNTING 'Fild Sept. 18, 1926 "Ullllllllllllllllll? anbmtq'c A. Gilten aimed A... 5192?. 1,623,785 'uurr STATES PATENT oFF'icaQ GEORGE A. GILLEN, OF JERSEY CITY, JERSEY, ASSIGNOB TO GILLEN LABORA- TORIES CORPORATION, OF ELMHURST, LONG ISLAND, NEW YORK, A. CORPORATION OF DELAWARE.

4 SOUND-REPRODUQER MOUNTING. Application filed September 18, 1926. Serial No. 136,938.

shaft 18, lost motion between the moving elements is eliminated.

In order that the tones that the volume of reprod ableto meet varying tastes, prising a pair of side bars 2?) connected at opposite ends by end members 2% and 25 is provided. As shown in the drawings, the end member 24 is formed with an inwardly pro ecting boss I of the recesses 17, while member 25, is formed with an internally screw threaded opening for the reception (it the pointed'set screw 27 which engages in the recess 17 opposite that into which the boss 26 is fitted. It is to be understood that This invention relates to improvements in sound reproducer mountings and has for its object to provide a device having a rotary stylus for engagement with the record disc of the usual phonograph.

Another object of the invention is to provide a device which may be removably sccured to the stylus arm of the usual reproducer without in any way altering its construction.

As a further object the invention is the provision of means for varying the volume of tone reproduced to meet varying require-- may be varied so notion is changea yoke 22, comthe opposite end ments. 1

"Nith the above and other objects in view the invention consists in the novel construction, combination and arrangement of parts which will be fully set forth in the following specification, laimed and illustrated in the accompanying drawing, in which.

Figure 1, is a side view on a greatly enlarged scale of this improved stylus and the mounting therefor, portions being broken away to more clearly illustrate the details of construction,

Figure 2, is a view taken at right Figure 1,

Figure 3, is a horizontal sectional view taken on line 3-3 of Figure 1, an

Figure 4, is a plan view of a modified form of the clamp.

Referring to the drawings, the numeral 10, designates a stylus arm 'provided with the customary set screw 11, by means of which the stylus is removably held in the socket 12. Thi improved stylus comprises a shank 13, having formed at one end a pair of divergent arms 14. Formed adjacent the extreme ends of the arms and in their inner faces, are recesses 15, for the reception of jewels forming the bearings for the rotary stylus which will be more fully hereinafter es'cribed. Formed in the outer sides the arms intermediate the jewel recesses and their convergent ends, are recesses 17, for a purpose to be more fully hereinafter set fort Mounted on a shaft 18, the ends of which taper as at 19 to fit inrecesses formed in the jewels 16, is a disc 20 which is ground to a fine edge 21 for contact with the walls of the record groove. It will thus be seen that the disc is mounted to rotate between the arms, and owing to the jewel mounting of the eliminated as shown in Figure 4:, without departing from the spirit and scope o ventlon, and that its operation is essentially the same as that of the yoke shown in Fig ure 3.

In use, when it is desired that the volume be ncreased, the Eyoke 22 is placed in the posltlon shown in igures 1 and 2, and owing to the reduction of length between the stylus and the clamp, the resiliency of the arms will 'be decrease the diaphragm angles to (not shown) effected, thus obtaining full volume. Up n m vi g t [yoke toward the convergent ends of the arms, their resiliency is increased, thus producmg a damping eflect upon the stylus arm through the absorption of some of the mechanical energy of the stylus, and reducing the volumeof tone reproduced. It is thus clearly apparent that a wide ran e of volume control may be had without cI stylus or stylus arm.

What is claimed is 1. In a sound reproducer, a stylusarm, a rotary stylus, and .means for varying the resiliency of the rotary stylus with relation to the stylus arm of the reproducer whereby the volume of tone reproduced may be varied. v

2. In a stylus for sound reproducing machines, a rotary element for engaging a rec'- ord tablet, means for supporting the rotary element at the end of the stylus arm of a reproducer, and means-intermediate the ends of the stylus supporting element tor increasing or decreasing the resiliency between the d and the full vibration of it so desired, one of the side bars 23 may be 26 for engagement in one iangmg the siliency of the forked member,-wherebythe ill ' of the fork.

volume of the member for varying its resiliency,

shank adapted to fit the stylus sound reproducer, a forked member at one sound reproduction, and a forked member supporting the stylus and connecting the same with the stylus arm of a reproducer. of a yoke adjustably mounted on the forked whereby the tones reproduced maybe soft or loud.

5. s a new article of manufacture, a stylus for sound reproduction comprising a arm of 21 end of the-shank, a rotary stylus mounted between the tines of the forked member.. and means for varying the resiliency of the tines may be loud or soft.

new article of manufacture, a

a stylus for sound reproduction com whereby the tones reproduced shank adapted to fit the sound reproducer, of the shank, a rotary st lus'mounted between the arms, said arms ing provided on stylus arm or their outer sides with recesses, and a yoke adapted to engage the arms and to be held in place by engagement with the walls of the recesses to vary the resiliency of the arms, wherebythe. tones reproduced may be made soft or loud.

As a. new article of manufacture, a stylus for sound reproduction comprising a shank adapted to-fit the stylus arm of a sound reproducer, divergent arms formed at one end of the shank, a shaft rotatable adjacent the free ends of the arms, a stylus disc mounted on the shaft,-the arms being provided at spaced intervals with horizontally aligning recesses,,a yoke, a boss carried by the yoke and adapted to enter certain of the recesses, and a screw carried bythe yoke for entrance into the recess opposite the boss.

Signed at New York, N. Y. this 15th day of September, 1926.

GEORGE A. GILLEN.,

divergent arms at one end 

